WO2006054515A1 - パラジウム含有担持触媒の製造方法 - Google Patents
パラジウム含有担持触媒の製造方法 Download PDFInfo
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- WO2006054515A1 WO2006054515A1 PCT/JP2005/020835 JP2005020835W WO2006054515A1 WO 2006054515 A1 WO2006054515 A1 WO 2006054515A1 JP 2005020835 W JP2005020835 W JP 2005020835W WO 2006054515 A1 WO2006054515 A1 WO 2006054515A1
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- palladium
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- salt
- carboxylic acid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/08—Heat treatment
- B01J37/082—Decomposition and pyrolysis
- B01J37/086—Decomposition of an organometallic compound, a metal complex or a metal salt of a carboxylic acid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
- B01J23/44—Palladium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/16—Reducing
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
- C07C51/21—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen
- C07C51/23—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of oxygen-containing groups to carboxyl groups
- C07C51/235—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of oxygen-containing groups to carboxyl groups of —CHO groups or primary alcohol groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
- C07C51/21—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen
- C07C51/25—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of unsaturated compounds containing no six-membered aromatic ring
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
- C07C51/21—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen
- C07C51/25—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of unsaturated compounds containing no six-membered aromatic ring
- C07C51/252—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of unsaturated compounds containing no six-membered aromatic ring of propene, butenes, acrolein or methacrolein
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J21/08—Silica
Definitions
- the present invention relates to a method for producing a palladium-containing supported catalyst for producing ⁇ , j8-unsaturated carboxylic acid from olefin or a, j8-unsaturated aldehyde.
- the present invention also relates to a method for producing a, j8-unsaturated carboxylic acid.
- a palladium-containing supported catalyst for liquid phase oxidation of olefin with molecular oxygen to produce a, j8-unsaturated carboxylic acid for example, WO 02Z083299 pamphlet is prepared by using a palladium salt with a reducing agent.
- Reduced palladium metal supported catalysts have been proposed.
- Japanese Patent Application Laid-Open No. 2000-202287 describes a palladium catalyst for hydrogenation reaction produced by carrying a dinitrodiammine palladium solution on an alumina carrier and then reducing it.
- an object of the present invention is to provide a palladium-containing supported catalyst for producing ⁇ , ⁇ unsaturated carboxylic acid with high selectivity from olefin or a, j8-unsaturated aldehyde, a method for producing the catalyst, and ⁇ Therefore, it is intended to provide a method for producing ⁇ -unsaturated carboxylic acid with high selectivity.
- the present invention relates to a method for producing a palladium-containing supported catalyst for producing ⁇ , j8-unsaturated carboxylic acid from olefin or a, j8-unsaturated aldehyde, which is supported on a support. And a palladium-containing supported catalyst having a step of reducing palladium oxide contained in the catalyst precursor in the produced state.
- the catalyst precursor is supported on the support by supporting the palladium salt on the support and heat-treating the support on which the palladium salt is supported! And a step of forming a catalyst precursor in which at least a part of the palladium salt is converted to palladium oxide.
- the heat treatment is preferably performed at a temperature equal to or higher than the thermal decomposition temperature of the palladium salt.
- the present invention is also a palladium-containing supported catalyst produced by the above method.
- the present invention is a method for producing an ⁇ , ⁇ unsaturated carboxylic acid in which olefin or ex, ⁇ unsaturated aldehyde is liquid phase oxidized with molecular oxygen using the palladium-containing supported catalyst.
- ⁇ , j8-unsaturated carboxylic acid when ⁇ , j8-unsaturated carboxylic acid is produced from olefin or ⁇ , ⁇ -unsaturated aldehyde, a, j8-unsaturated carboxylic acid It is possible to produce a palladium-containing supported catalyst that can be produced with high selectivity.
- a, j8-unsaturated carboxylic acid can be produced with high selectivity.
- the method for producing a palladium-containing supported catalyst of the present invention is a method for producing a palladium-containing supported catalyst having a step of reducing palladium oxide contained in the catalyst precursor while being supported on a carrier.
- Acid radium d value 2. 64, 1. 68, 2. 67
- the palladium-containing supported catalyst of the present invention is a supported catalyst in which a catalyst constituent element is supported on a carrier, and is produced by the above method.
- the carrier is not particularly limited as long as it can support palladium oxide.
- a method of heat-treating a support after a palladium salt is supported on the support is preferred, and examples thereof include inorganic oxides that are difficult to generate combustion or alteration under the heat-treatment conditions.
- These carriers are preferred.
- silica, alumina, silica-alumina, magnesium, canoresia, titer, zirconia and the like can be mentioned, among which silicic power, titer, and zircoyu are preferable.
- One carrier can be used, or two or more carriers can be used in combination.
- the specific surface area of the support varies depending on the type of the support and the like, it cannot be generally stated, but in the case of silica, it is preferably 50 m 2 Zg or more, more preferably 100 m 2 Zg or more. Further, more preferably at most 1500 m 2 Zg hereinafter is preferably instrument 1000 m 2 Zg. The smaller the specific surface area of the carrier, the more the catalyst with the useful component supported on the surface can be produced, and the larger the specific surface area, the more the useful component can be produced.
- a catalyst precursor in which at least palladium oxide is supported on the support is prepared.
- the catalyst precursor is obtained by dispersing the support and palladium oxide in a solvent, and then evaporating the solvent.
- a palladium salt is supported on a support in advance, and then the support is heat-treated. It is preferable to prepare.
- a method of supporting the palladium salt on the carrier a method of evaporating the solvent after immersing the carrier in a solution of palladium salt, or a solution of palladium salt corresponding to the pore volume of the carrier is absorbed by the carrier.
- a method based on the so-called pore filling method in which the solvent is evaporated thereafter is preferable.
- the solvent for dissolving the palladium salt is not particularly limited as long as it dissolves the palladium salt.
- the heat treatment temperature is preferably equal to or higher than the thermal decomposition temperature of noradium salt. Also, 800 ° C or lower is preferable, and 700 ° C or lower is more preferable.
- the method for raising the temperature up to the predetermined heat treatment temperature is not particularly limited, but the temperature rise rate is preferably 1 to 10 ° CZ in order to obtain a good dispersion state of palladium atoms in the palladium-containing supported catalyst.
- the holding time after reaching the predetermined heat treatment temperature is not particularly limited as long as the palladium salt is decomposed, but is preferably 1 to 12 hours.
- the palladium salt in order to change the palladium salt to palladium oxide, it is preferable to perform a heat treatment at a temperature equal to or higher than the thermal decomposition temperature of the palladium salt.
- a heat treatment at a temperature equal to or higher than the thermal decomposition temperature of the palladium salt.
- aggregation and growth of the noradium particles can be suppressed, so that the dispersibility of the palladium particles is improved, and ⁇ , ⁇ unsaturated carboxylic acid is more highly selected from olefin or ⁇ , ⁇ unsaturated aldehyde. It becomes possible to manufacture at a rate.
- a palladium salt having a thermal decomposition temperature of 400 ° C. or lower as a noradium salt it is preferable to support a palladium salt having a thermal decomposition temperature of 400 ° C. or lower as a noradium salt.
- the thermal decomposition temperature of the palladium salt is more preferably 300 ° C or less, particularly preferably 200 ° C or less.
- the lower the decomposition temperature of the radium salt the less calorific value.
- a palladium salt with a thermal decomposition temperature of 200 ° C or less even when the carrier layer on which the palladium salt is supported during heat treatment is thick, the calorific value is reduced and the aggregation and growth of palladium particles are suppressed. Can do.
- the layer height of the support on which the palladium salt is supported during the heat treatment is determined from the relationship between the amount of catalyst and the scale of the calciner. Since it is usually unavoidable that the thickness of the layer increases, the fact that it can be manufactured with a high selectivity even if the layer height is increased is a great advantage when scaling up.
- a palladium salt having a thermal decomposition temperature of 400 ° C or lower is supported on a carrier, and the carrier on which the palladium salt is supported is heat-treated at a temperature equal to or higher than the thermal decomposition temperature of the palladium salt. It is particularly preferable to use a catalyst precursor in which at least a part of the palladium salt supported on palladium is palladium oxide.
- Examples of palladium salts used include palladium chloride ( ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ) (thermal decomposition temperature: 650 ° C), palladium acetate ( ⁇ ) (thermal decomposition temperature: 230 ° C), palladium nitrate ( ⁇ ) (thermal decomposition). Temperature: 120 ° C), tetraamminepalladium nitrate ( ⁇ ) (thermal decomposition temperature: 220 ° C), bis (acetylacetonato) palladium ( ⁇ ) (thermal decomposition temperature: 210 ° C), and the like.
- palladium acetate ( ⁇ ), palladium nitrate ( ⁇ ), tetraamminepalladium nitrate (II), and bis (acetylacetonato) palladium ( ⁇ ) are preferred.
- One palladium salt can be used, or two or more palladium salts can be used in combination.
- the thermal decomposition temperature of the palladium salt can be measured by thermogravimetry. Here, 10% weight is reduced when palladium salt is heated from room temperature to 5.0 ° CZ in air flow using a thermogravimetric measurement device (manufactured by Shimadzu Corporation, trade name: TGA-50). This temperature was defined as the thermal decomposition temperature of the palladium salt.
- a catalyst precursor in which at least a part of the palladium salt supported on the carrier is decomposed into palladium oxide is obtained.
- palladium oxide contained in the catalyst precursor obtained by the heat treatment is reduced. Specifically, palladium metal supported on the support is reduced to a palladium metal by reducing with a reducing agent.
- the palladium salt is simultaneously reduced to palladium metal.
- the reducing agent to be used is not particularly limited.
- Two or more reducing agents can be used in combination.
- hydrogen is preferable as the reducing agent.
- hydrazine, formaldehyde, formic acid, and a formic acid salt are preferred as the reducing agent.
- the solvent used in the reduction in the liquid phase is preferably water, but depending on the dispersibility of the carrier, alcohols such as ethanol, 1 propanol, 2-propanol, n-butanol, and t-butanol Ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone and cyclohexanone; Organic acids such as acetic acid, n-valeric acid and isovaleric acid; Hydrocarbons such as heptane, hexane and cyclohexane These organic solvents can be used alone or in combination. A mixed solvent of these and water can also be used.
- alcohols such as ethanol, 1 propanol, 2-propanol, n-butanol, and t-butanol
- Ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone and cyclohexanone
- Organic acids such as
- the reducing agent is a gas
- a pressure device such as an autoclave in order to increase the solubility in the solution.
- the inside of the pressurizer is pressurized with a reducing agent.
- the pressure is preferably 0.1 to 1.
- OMPa gauge pressure; hereinafter, pressure is expressed as gauge pressure).
- the apparatus for reducing palladium oxide is not limited, and the reducing agent can be added to the solution.
- the amount of reducing agent used at this time is not particularly limited, but is preferably 1 to: LOO mol per mol of palladium oxide.
- the reduction temperature and reduction time vary depending on the reducing agent and the like, the reduction temperature is preferably 5 to 150 ° C, more preferably 15 to 80 ° C.
- the reduction time is preferably 0.1 to 4 hours, more preferably 0.25 to 3 hours, and even more preferably 0.5 to 2 hours.
- the palladium-containing supported catalyst in which palladium metal is supported on a carrier is separated.
- the method for separating the catalyst is not particularly limited, and for example, methods such as filtration and centrifugation can be used.
- the separated palladium-containing supported catalyst is appropriately dried.
- the drying method is not particularly limited, and various methods can be used.
- the palladium-containing supported catalyst of the present invention may contain a metal component other than palladium.
- metal components other than noradium include ruthenium, rhodium, silver, osmium, iridium, platinum, gold, copper, antimony, tellurium, lead, and bismuth. From the viewpoint of developing high catalytic activity, it is preferable that 50% by mass or more of the metal contained in the palladium-containing supported catalyst is palladium metal.
- Palladium-containing supported catalysts containing these metal components are used for metallization of corresponding metal salts and oxides. It can be obtained by supporting the compound on a carrier and performing the above reduction as required.
- the method for supporting the metal compound at that time is not particularly limited, but can be carried out in the same manner as the method for supporting the palladium salt. Further, the metal compound can be supported before the palladium salt is supported, can be supported after the palladium salt is supported, or can be supported simultaneously with the palladium salt.
- the loading ratio of the metal component containing palladium with respect to the carrier is preferably 0.1 to 40% by mass, more preferably 0.5 to 30% by mass, and 1 to 20% by mass with respect to the carrier before loading. Is even more preferred.
- Examples of olefins as raw materials include propylene, isobutylene, 2-butene and the like.
- Examples of the raw ⁇ , ⁇ unsaturated aldehyde include acrolein, methacrolein, crotonaldehyde (j8-methylacrolein), cinnamaldehyde (j8-phenolacrolein), and the like.
- the ex, ⁇ -unsaturated carboxylic acid to be produced is an OC, ⁇ -unsaturated carboxylic acid having the same carbon skeleton as that of olefin when the raw material is olefin. Also, when the raw material is OC, j8-unsaturated aldehyde, it is a, j8-unsaturated carboxylic acid in which the aldehyde group of a, j8-unsaturated aldehyde is changed to a carboxyl group.
- the production method of the present invention is suitable for a liquid-phase acid which produces methacrylic acid from propylene or acrolein strength acrylic acid, isobutylene or methacrolein.
- the raw material olefin or ⁇ , ⁇ unsaturated aldehyde may contain a small amount of saturated hydrocarbons, sulfur or lower saturated aldehyde, and the like as impurities.
- Air is economical as the molecular oxygen source used in the liquid-phase acid-acid reaction, but pure oxygen or a mixed gas of pure oxygen and air can also be used. If necessary, air or pure oxygen can be used. A mixed gas obtained by diluting oxygen with nitrogen, carbon dioxide, water vapor, or the like can also be used.
- the solvent used for the liquid-phase acid-acid reaction is not particularly limited.
- water alcohols such as tertiary butanol and cyclohexanol; acetone, methyl ethyl ketone, methyl Ketones such as isobutyl ketone; organic acids such as acetic acid, propionic acid, n butyric acid, isobutyric acid, n-valeric acid, isovaleric acid; organic acid esters such as ethyl acetate and methyl propionate; hexane, cyclo Hydrocarbons such as hexane and toluene can be used.
- alcohols such as tertiary butanol and cyclohexanol
- acetone methyl ethyl ketone
- methyl Ketones such as isobutyl ketone
- organic acids such as acetic acid, propionic acid, n butyric acid, isobutyric acid,
- the solvent may be one kind or a mixed solvent of two or more kinds.
- a mixed solvent with water.
- the amount of water at that time is not particularly limited, but it is preferably 2 to 70% by mass, more preferably 5 to 50% by mass, based on the mass of the mixed solvent.
- the solvent is desirably uniform, it may be used in a non-uniform state.
- the liquid phase oxidation reaction may be carried out in either a continuous type or a batch type, but in view of productivity, the continuous type is preferred industrially.
- the amount of olefin or ⁇ , ⁇ -unsaturated aldehyde used as a raw material for the liquid phase oxidation reaction is preferably 0.1 to 20 parts by mass with respect to 100 parts by mass of the solvent 0.5 to L0 Mass parts are more preferred.
- the amount of molecular oxygen used is preferably 0.1 to 30 monoreca S, more preferably 0.3 to 25 monoreca S relative to the raw material olefin or a, ⁇ -unsaturated aldehyde 1 monole, 0.5 ⁇ 20 mol is particularly preferred.
- the catalyst is used in a state of being suspended in a reaction solution for performing liquid phase oxidation, but may be used in a fixed bed.
- the amount of the catalyst used is preferably 0.1 to 30 parts by weight, more preferably 0.5 to 20 parts by weight as the catalyst present in the reactor, with respect to 100 parts by weight of the solution present in the reactor. 1 to 15 parts by mass is particularly preferred.
- the reaction temperature and the reaction pressure are appropriately selected depending on the solvent used and the reaction raw materials.
- the reaction temperature is preferably 30 to 200 ° C, more preferably 50 to 150 ° C.
- the reaction pressure is atmospheric pressure (OMPa) ⁇ : LOMPa is preferred 2-7 MPa force is more preferred.
- the reaction rate of olefin or ⁇ , ⁇ unsaturated aldehyde, the selectivity of ⁇ , ⁇ unsaturated aldehyde to be produced, and the selectivity of ⁇ , ⁇ unsaturated carboxylic acid to be produced are defined as follows.
- ⁇ is the number of moles of olefin or ⁇ , ⁇ unsaturated aldehyde supplied
- ⁇ is the number of moles of reacted olefin or ⁇ , j8-unsaturated aldehyde
- C is the mole of ⁇ , ⁇ -unsaturated aldehyde produced.
- D is the number of moles of ⁇ , ⁇ unsaturated carboxylic acid produced.
- CZB 0 in the case of an acid reaction of a, j8-unsaturated aldehyde.
- the following examples and comparative examples are reactions for producing methacrylic acid from isoprene, in which A is the number of moles of isobutylene supplied, B is the number of moles of reacted isobutylene, and C is produced. The number of moles of methacrolein, D is the number of moles of methacrylic acid produced.
- Palladium acetate ( ⁇ ) (manufactured by NE Chemcat, thermal decomposition temperature: 230 ° C.) 2.
- An acetic acid solution was prepared by dissolving 2 parts in 20.0 parts of acetic acid.
- Silica support (specific surface area 450 m 2 Zg, pore volume 0.68 cc / g) 20.0 parts of the acetic acid solution was added little by little, and shaking was repeated. When the acetic acid solution corresponding to the total pore volume was added, evaporation was performed. Similarly, the remaining acetic acid solution was added in small portions and shaken repeatedly. Evaporation was performed to obtain a silica carrier carrying palladium acetate ( ⁇ ).
- the silica support carrying palladium acetate () was spread thinly and uniformly on a stainless steel vat (15cm x 20cm), and as a heat treatment, the temperature was raised from room temperature to 450 ° C in air at a rate of 2.5 ° CZ. 4 After holding at 50 ° C for 3 hours, the temperature was lowered to room temperature. When XRD measurement of the obtained catalyst precursor was performed, it was confirmed that palladium oxide was produced. [0052] This catalyst precursor was added to 50.0 parts of a 37 mass% aqueous formaldehyde solution. The mixture was heated to 70 ° C. and stirred for 2 hours. After suction filtration, it was filtered and washed with 1000 parts of pure water.
- the inside of the autoclave was ice-cooled in an ice bath.
- a gas collection bag was attached to the gas outlet of the autoclave, and the pressure in the reactor was released while collecting the gas that was opened by opening the gas outlet.
- the reaction solution containing the catalyst was taken out from the autoclave, and the catalyst was separated by a membrane filter, and the reaction solution was recovered.
- the collected reaction liquid and the collected gas were analyzed by gas chromatography, and the reaction rate and selectivity were calculated.
- the heat treatment was performed in the same manner as in Example 1 except that the temperature was raised to 300 ° C in 2.5 ° CZ minutes and maintained at 300 ° C for 3 hours.
- XRD measurement of the catalyst precursor confirmed that palladium oxide was formed.
- the obtained palladium-containing supported catalyst palladium metal loading: 5.0% by mass
- Example 3 The same method as in Example 1 was performed. [0057] [Example 3]
- the heat treatment was performed in the same manner as in Example 1 except that the temperature was raised to 600 ° C in 2.5 ° CZ minutes and maintained at 600 ° C for 3 hours.
- XRD measurement of the catalyst precursor confirmed that palladium oxide was formed.
- palladium metal loading: 5.0% by mass it was confirmed that the XRD peak derived from palladium oxide disappeared and metal palladium was produced.
- Silica support (specific surface area 450 m 2 Zg, pore volume 0.668 cc / g) 20. 0 parts of palladium nitrate ( ⁇ ) solution (manufactured by Sigma-Aldrich, 10 mass% palladium nitrate in 10 mass% nitric acid aqueous solution) Solution containing (soot), Palladium nitrate (soot pyrolysis temperature: 120 ° C.) 22. It was immersed in Og and evaporated to obtain a silica carrier carrying palladium nitrate (soot).
- ⁇ palladium nitrate
- the silica support carrying palladium nitrate ( ⁇ ) was spread thinly and evenly on a stainless steel vat (15cm x 2 Ocm), and as a heat treatment, the room temperature was raised to 450 ° C in air in 2.5 ° CZ minutes. After holding at 450 ° C for 3 hours, the temperature was lowered to room temperature. When XRD measurement of the obtained catalyst precursor was performed, it was confirmed that palladium oxide was produced.
- This catalyst precursor was added to 50.0 parts of a 37 wt% aqueous formaldehyde solution. The mixture was heated to 70 ° C. and stirred for 2 hours. After suction filtration, it was filtered and washed with 1000 parts of pure water. Furthermore, it was dried at 100 ° C. for 2 hours under a nitrogen flow to obtain a palladium-containing supported catalyst (palladium metal loading: 5.0% by mass). As a result of XRD measurement of the obtained catalyst, it was confirmed that the XRD peak derived from palladium oxide disappeared and metal palladium was produced.
- This catalyst precursor was added to 50.0 parts of a 37 mass% aqueous formaldehyde solution. The mixture was heated to 70 ° C. and stirred for 2 hours. After suction filtration, it was filtered and washed with 1000 parts of pure water. Furthermore, it was dried at 100 ° C. for 2 hours under a nitrogen flow to obtain a palladium-containing supported catalyst (palladium metal loading: 5.0% by mass). As a result of XRD measurement of the obtained catalyst, it was confirmed that the XRD peak derived from palladium oxide disappeared and metal palladium was produced.
- This catalyst precursor was added to 50.0 parts of a 37 mass% aqueous formaldehyde solution. Add to 70 ° C Heated, held for 2 hours with stirring, filtered with suction and filtered and washed with 1000 parts of pure water. Furthermore, it was dried at 100 ° C. for 2 hours under a nitrogen flow to obtain a palladium-containing supported catalyst (palladium metal loading: 5.0% by mass). As a result of XRD measurement of the obtained catalyst, it was confirmed that the XRD peak derived from palladium oxide disappeared and metal palladium was produced.
- Salty palladium ( ⁇ ) (manufactured by NE Chemcat, thermal decomposition temperature: 650 ° C.) 1. A solution in which 66 parts were dissolved in 13.6 parts of IN hydrochloride was prepared. Silica support (specific surface area 450 m 2 / g, pore volume 0.68 cc / g) 20. Add the above solution to 0 parts in small portions, shake repeatedly, and then evaporate to give chloride. A silica support on which palladium (aluminum) was supported was obtained.
- This catalyst precursor was added to 50.0 parts of a 37 mass% aqueous formaldehyde solution. The mixture was heated to 70 ° C. and stirred for 2 hours. After suction filtration, it was filtered and washed with 1000 parts of pure water. Furthermore, it was dried at 100 ° C. for 2 hours under a nitrogen flow to obtain a palladium-containing supported catalyst (palladium metal loading: 5.0% by mass). As a result of XRD measurement of the obtained catalyst, it was confirmed that the XRD peak derived from palladium oxide disappeared and metal palladium was produced.
- Example 4 The same procedure as in Example 4 was performed, except that a silica support carrying palladium nitrate ( ⁇ ) was placed in a tall beaker and subjected to heat treatment (silica support layer height during heat treatment: about 5. Ocm).
- the heat treatment was performed in the same manner as in Example 7 except that the temperature was raised to 400 ° C in 2.5 ° CZ minutes and maintained at 400 ° C for 3 hours.
- An XRD measurement of the catalyst precursor revealed that no palladium oxide was produced. Further, it was confirmed that metal palladium was produced in the obtained palladium-containing supported catalyst (palladium metal loading: 5.0% by mass).
- the heat treatment was performed in the same manner as in Example 1 except that the temperature was raised to 100 ° C in 2.5 ° CZ minutes and maintained at 100 ° C for 3 hours.
- XRD measurement of the solid obtained by heat treatment revealed that palladium oxide was not formed.
- metal palladium was produced in the obtained palladium-containing supported catalyst (palladium metal loading: 5.0% by mass).
- ⁇ , ⁇ unsaturated carboxylic acid can be obtained with higher selectivity. It was possible to produce acid.
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CN2005800464575A CN101098754B (zh) | 2004-11-17 | 2005-11-14 | 含钯的载体催化剂的制造方法 |
KR1020077013573A KR101227753B1 (ko) | 2004-11-17 | 2005-11-14 | 팔라듐 함유 담지 촉매의 제조방법 |
US11/719,461 US8088946B2 (en) | 2004-11-17 | 2005-11-14 | Method for manufacturing palladium-containing catalyst |
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JP2005292393A JP5001543B2 (ja) | 2004-11-17 | 2005-10-05 | パラジウム含有担持触媒の製造方法 |
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JP5142258B2 (ja) * | 2007-02-06 | 2013-02-13 | 独立行政法人産業技術総合研究所 | 炭素担持貴金属ナノ粒子触媒の製造方法 |
JP5340705B2 (ja) * | 2008-01-08 | 2013-11-13 | 三菱レイヨン株式会社 | 貴金属含有触媒の製造方法、並びにα,β−不飽和カルボン酸及びα,β−不飽和カルボン酸無水物の製造方法 |
JP5609394B2 (ja) * | 2009-11-12 | 2014-10-22 | 三菱レイヨン株式会社 | パラジウム含有担持触媒の製造方法、およびα,β−不飽和カルボン酸の製造方法 |
CN110201664A (zh) * | 2019-06-26 | 2019-09-06 | 陕西瑞科新材料股份有限公司 | 一种竹炭镀膜钯催化剂的制备方法 |
CN111992248B (zh) * | 2019-11-15 | 2021-07-23 | 北京水木滨华科技有限公司 | 一种异丁烯氧化酯化用催化剂及其制备方法和用途 |
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JP5001543B2 (ja) | 2012-08-15 |
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US20080306298A1 (en) | 2008-12-11 |
US8088946B2 (en) | 2012-01-03 |
KR20070093981A (ko) | 2007-09-19 |
CN101098754A (zh) | 2008-01-02 |
CN101098754B (zh) | 2013-07-17 |
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